BOOT OUT (phrasal verb) definition and synonyms | Macmillan Dictionary.

What is the verb of out?

out. verb. outed; outing; outs. Definition of out (Entry 2 of 6) 1 transitive : to identify (someone) publicly as being such secretly Ever feel as if your achievements are a fluke or that you're one conversation away from being outed as a fraud?—

What is the meaning of chickened out?

informal. : to decide not to do something because one is afraid He was going to ask her on a date, but he chickened out at the last minute.